The second edition of the background sourcebook describing Innsmouth for 1920s Call of Cthulhu. Contains revisions and corrections to the original, plus an additional scenario (The Crawford Inheritance).

Three scenarios are included:

- The Crawford Inheritance
- Escape from Innsmouth
- The Raid on Innsmouth

From the back cover:
"A century ago Innsmouth was a thriving community on the Massachusetts coast. Then a shadow fell over Innsmouth. There were whispered rumors of heathen religions and blasphemous pacts. Now Innsmouth lies rotting, its harbor choked with sand, the town itself nearly engulfed by salt marshes. Outsiders shun Innsmouth and its sullen, deformed inhabitants. But the secret is still there. Hiding. Festering. Growing. Waiting.

This book recreates H.P. Lovecraft's most haunted locale for the Call of Cthulhu roleplaying game. Herein are described all of the terrible places, brooding characters, evil tomes, and monstrous inhabitants of shadowed Innsmouth. This is a revised, second edition, containing all of the original source material and maps, with corrections. Included for the first time in this edition are an introductory Innsmouth scenario and an entirely new section for the acclaimed 'Raid on Innsmouth' adventure."